Add preserve_extracted_files option in compare_images

With the option: extract zip file in the directory where zip is, and the
extracted files remain.
Without the option: extract zip file in tmp and clean up after a run

Test: check if files remain with -p option
Bug: N/A
Change-Id: I1aa74c017dbb885481b8f5a0674d089c0a732620
1 file changed